Because some unofficial mirrors pack the driver with "activators." The genuine Feitian installer will not trigger Defender. If you see a warning, delete the file and re-download from the official source.
: The Z3x-Team Wiki provides a step-by-step installation guide for Windows 10 and 11. Installation Steps Z3x Smart Card Rockey 200 Driver-- Free
: Plug in your Z3X box or dongle. Windows should automatically detect the device. Because some unofficial mirrors pack the driver with
The Rockey 200 is a portable USB Smart Card reader used as a data bridge between your PC and the smart card (SIM) inside your Z3X Box. Where to Download the Driver Z3x Smart Card Rockey 200 Driver-- Free
– Plug in your Z3x box with the Smart Card. Windows should now detect "Rockey 200 Smart Card" under Universal Serial Bus devices.